大天巨星系红移巡天

Large Sky Area Redshift Surveys of Galaxies

星系的红移巡天是观测宇宙学中最基本的工作，有关宇宙大尺度结构研究中的许多关键问题，例如宇宙中最大结构的尺度，宇宙中大尺度结构的拓扑特征，以及有关宇宙物质分布的密度场和速度场的许多基本性质的研究，都依赖于覆盖面积足够大、极限星等足够暗的完备的星系红移大样本．通过对巡天的覆盖天区、巡天深度、选样方法、巡样率等方面的分析，比较了最近已完成的一些红移巡天（IRAS、CfA、SSRS、ORS和LCRS等）并对计划中的2dF和SDSS巡天计划作了简要介绍．

This paper briefly introduces the present and future large sky area redshift surveys of galaxies, which are the fundamental work for observational cosmology. Many key problems about large scale structure, such as the topological characters and the largest scale of the structure in the universe and many basic properties of density and velocity fields as well, depend on the sky coverage and deepness of complete samples of redshift surveys of galaxies. Particularly, we analyze and compare the sky coverage, magnitude limit, criteria of selected sample, sampling rate and so on of the newly finished redshift surveys: IRAS, CfA, SSRS, ORS, LCRS. The proposed 2dF and SDSS surveys have also been discussed.